Continuous reacceleration of cosmic rays in galaxies - an alternative explanation for flat low frequency radio spectra

Details Continuous reacceleration of cosmic rays in galaxies - an alternative explanation for flat low frequency radio spectra Continuous reacceleration of cosmic rays in galaxies - an alternative explanation for flat low frequency radio spectra

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...263...37p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 263, no. 1-2, p. 37-40.

Astronomy and Astrophysics

Astrophysics

4

Electron Acceleration, Galactic Cosmic Rays, Radio Spectra, Spiral Galaxies, Astronomical Models, Radiant Flux Density, Spectrum Analysis

Scientific paper

Three physical models for the observed strong turn-over in the total radio spectrum of M33 are discussed. While free-free absorption and the dynamical halo model including ionization and Coulomb losses can be ruled out on the basis of unrealistic implied parameter values, we propose continuous reacceleration by the second order Fermi process as a viable alternative.

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